Course Title: Aerospace Mechanisms

Part B: Course Detail

Teaching Period: Term1 2011

Course Code: AERO5392

Course Title: Aerospace Mechanisms

School: 130T Engineering (TAFE)

Campus: City Campus

Program: C6011 - Advanced Diploma of Engineering (Aerospace)

Course Contact : Steven Bevan

Course Contact Phone: 03 9925 4137

Course Contact Email:steven.bevan@rmit.edu.au


Name and Contact Details of All Other Relevant Staff

Teacher : Yadana Wai
Contact Detail
Location: 57.5.20
Telephone: 9925 4461
E-mail: yadana.wai@ rmit.edu.au

Nominal Hours: 40

Regardless of the mode of delivery, represent a guide to the relative teaching time and student effort required to successfully achieve a particular competency/module. This may include not only scheduled classes or workplace visits but also the amount of effort required to undertake, evaluate and complete all assessment requirements, including any non-classroom activities.

Pre-requisites and Co-requisites

MATH5156 Aerospace Mathematics 1
ONPS5098 Aerospace Physics 1
ONPS5100 Aerospace Physics 2
AERO5390 Stress 1

Course Description

The purpose of this course is to provide training in aerospace mechanisms, power transmission devices and associated calculations.
This course involves the principles of analysis and design of mechanical sub-systems commonly used in aircraft. Areas of study include: friction and gear mechanism, linkages, bearings and mechanical vibrations.


National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

VBH740 Aerospace Mechanisms


Learning Outcomes


1. Explain concepts and perform calculations related to torque transmissions driven through friction mechanisms.
2. Analyse linkage operation and calculate stresses in linkages.
3. Explain and evaluate a range of types of bearings and perform calculations relating to bearings.
4. Explain in words and diagrams the manufacture and operation of gear mechanisms and perform related calculations.
5. Explain aspects of mechanical vibration and perform related calculations.


Details of Learning Activities

The purpose of this module is to provide the training in aerospace mechanisms, power transmission devices and associated calculations. This module also facilitates articulation into Aerospace and Engineering degree courses. This course will cover the areas in frictrion mechanisms, linkages, bearings, gear mechanisms and mechanical vibrations.
The students will participate in activities such as the class lectures, tutorials and exercises, assignment and exam.


Teaching Schedule

 Teaching Schedule
Session Topic
1Introduction to the subject, basic concepts of force, torque, energy, power, work, linear and angular displacement, velocity and acceleration.
2The concept of friction, coefficient of friction and properties of friction materials, inclined surfaces and power screw.
3Fiction mechanisms-brakes/Clutches.
4Common methods of brake/clutch actuation in aircraft and torque transmitted by brakes/Clutches.
5Linkage mechanisms, their operations and calculation of stresses in linkages.
6Gear mechanisms, common gear types, their applications and related calculations-relationships between rotational speed, number of teeth, pitch circle diameters, torque and centre distances for simple gear trains and for compound gear trains. Week 1
7Gear mechanisms, common gear types, their applications and related calculations-relationships between rotational speed, number of teeth, pitch circle diameters, torque and centre distances for simple gear trains and for compound gear trains. Week 2
8Types of bearings-plain bearing, ball, roller, foil and self-aligning, applications of rolling element bearings in aircraft , their operating principles and calculations of static and dynamic loads.
9Mechanical Vibration-the nature of vibrations & sources of vibration in aircraft, damping,free Versus forced Vibration, differential equation of motion for an undamped & damped one degree of freedom system subject to free vibration and calculations of
• natural frequency
• maximum amplitude
• displacement at a given time.
10Differential equation of motion for a damped and undamped, one degree of freedom system, subject to forced vibration. Calculation of
natural frequency
maximum amplitude
amplitude ratio
maximum amplitude ratio (damped)
phase angle between the response and the forcing function (damped)
11Revision
12Closed Book Exam


Learning Resources

Prescribed Texts


References

Hannah, J., and Stephens, R.C., 1984., Mechanics of Machines, Elementary Theory and Examples., E.Arnold, London. ISBN 0713134712

Baumeister, T. et al, 1987., Marks’Standard Handbook for Mechanical Engineers., McGraw-Hill

Hall, et al. 1980., Schaum’s Outline of the theory and problems of Machine Design., McGraw-Hill., ISBN 00784342X

Shigley, J.E., and Mitchell, L.D., 1983., Mechanical Engineering Design., McGraw-Hill.,
ISBN 007056888X


Other Resources

Class notes, lectures and exercises.


Overview of Assessment

To successfully complete this course the student is required to pass written assessment tasks and demonstrate skills and ability by completing pratical tasks to aerospace standard.


Assessment Tasks

Participants are required to complete three assessment tasks. The first assignment is worth 30% , the second assignment is worth (20%)  and the final closed book exam is worth 50%. In order to pass the course, student must attain minimum 50% on individual assessment.

Assessment Item 1 (30%): ASSIGNMENT
Assessment Item 2 (20%): ASSIGNMENT
Assessment Item 3 (50%): FINAL EXAMINATION

Grading Criteria

HD High Distinction 80 - 100 %
DI Distinction 70 - 79 %
CR Credit 60 - 69 %
PA Pass ( High Grading available 50 - 59 %
PX Pass ( No Higher Grading available) 50 - 100 %
NN Fail 0 - 49 %


Academic Misconduct

Students are reminded that cheating, whether by fabrication, falsification of data, or plagiarism, is an offence subject to University disciplinary procedures. Plagiarism in oral or written presentations is the presentation of the work, idea or creation of another person, without appropriate referencing, as though it is one’s own. Plagiarism is not acceptable.

The use of another person’s work or ideas must be acknowledged. Failure to do so may result in charges of academic misconduct which carry a range of penalties including cancellation of results and exclusion from your course.

Students are responsible for ensuring that their work is kept in a secure place. It is also a disciplinary offence for students to allow their work to be plagiarised by another student. Students should be aware of their rights and responsibilities regarding the use of copyright material. It is strongly recommended that students refer to the RMIT 2001 Guidelines for Students or to the RMIT University Homepage.




Assessment Matrix

Assessment Matrix

Assessment MethodLearning OutcomesPercentage
Assignment One1 to 330%
Assignment Two2 to 520%
Closed book exam1 to 550%

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